** Item numbers for the 11-SG and 7-SG series are created by adding additional numbers and letters to the series for each bearing bar size. CS (carbon steel) or SS (stainless steel) is placed after the SG to designate the material. For example, a 11-SG carbon steel grating with a bearing bar size of 1–1/4 by 1/8 inch is a 11-SGCS-125A.